6-Speed ZF S6-650 transmission Swap

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09-11-2014, 10:00 AM

#71

hd4mud

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Quote:

Originally Posted by Murdick03Z71

Hi I'm new to the forum and I've been reading this thread for a while.... I am planning on doing this swap on my 2003 sierra 1500. In the near future I am going to put 37s on my truck. With the 4L60E I would need to upgrade from 3.73s to 4.88s. But with the ZF6 would I need to change them? I only ask this because the 1st gear in the ZF6 is a lot lower than the 4L60E.... Any help would be greatly appreciated!

1st is a lot lower in ZF6. 37s would be stretch though. Also gears are a lot cheaper than a ZF6. With ZF6 your looking at 2k+ for the trans, several hundred to make your transfer work or another 1k+ for the 263XHD transfer, clutch parts are another 500+. It will hold twice the HP of the 60, but I would not do it just to avoid gears.

Not to mention, what are you going to do with the 10bolts and CVs. They won't like 37s at all.

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09-11-2014, 10:17 AM

#72

hd4mud

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Quote:

Originally Posted by ls2 dude

from what i can see i will still need a different input shaft even with the hd T case?

The OP used an input shaft that is available for the NP246 (and 241) because those transfers were used in Dodge trucks. I'm not sure that shaft is available for the NP263. I never checked because the cost of the shaft, the time to put it in, and the age of my NP263 convinced me to pop the extra $600 for the NP263XHD which is a good bit stronger. (7/16ths links vs 3/8ths)

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02-09-2015, 02:08 PM

#73

GreyChevy

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Know this is an old thread but awesome write up

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01-20-2017, 05:48 PM

#74

kwbudaman

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Outstanding write up! I have a 2000 GMC ccsb (454, nv4500, 4wd) that I bought new, and am now in process of replacing the frame, thanks to east coast termintes. Putting a zf6 in has been rolling around the back of my mind for awhile, and this thread answered quite a few questions.

Thanks again!

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01-30-2017, 06:36 PM

#75

Ekimw2500hd

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Nv4500 6.o

Nice swap. The nv4500 will bolt up to the 6.0. Where can I find one without having a core. I found some places online that sell them but you need a core. Any suggestions

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01-31-2017, 05:02 PM

#76

kwbudaman

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Quote:

Originally Posted by Ekimw2500hd

Nice swap. The nv4500 will bolt up to the 6.0. Where can I find one without having a core. I found some places online that sell them but you need a core. Any suggestions

Have you looked on car-part.com or junkyarddog.com?

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01-31-2017, 05:03 PM

#77

Ekimw2500hd

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Quote:

Originally Posted by kwbudaman

Have you looked on car-part.com or junkyarddog.com?

no I haven't but thanks I'll try those

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03-21-2017, 01:09 PM

#78

hd4mud

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Quote:

Originally Posted by Ekimw2500hd

Nice swap. The nv4500 will bolt up to the 6.0. Where can I find one without having a core. I found some places online that sell them but you need a core. Any suggestions

I got my ZF6 from JustChevyTrucks in Maine.

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04-30-2017, 01:08 PM

#79

Shj431

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hi dear

Quote:

Originally Posted by pirish05

The tccm with a auto trac 246 needs to see a neutral/park signal from the ecm in order to allow a 4 low shift. It communicates via class 2 serial data and I have the neutral safety switch that was on the side of the 4l60 plugged in and in neutral and am still unable to get the t-case in 4 low. I was wondering if anyone else had done the swap and how they solved the issue.

did you solve this problem if yes please i need to now how you solve it i have same problem with np246 all work andthe 4l not work only blinking i think it was becuse i swap a 6.0 in my tahoe 1999 2dr with new wiring

good news finally I solved the problem and my np246 transfer case work good with all options it is easy 👍🏻👍🏻

Last edited by Shj431; 05-03-2017 at 12:28 PM.

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05-02-2017, 09:13 PM

#80

2002_Z28_Six_Speed

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Quote:

Originally Posted by Ekimw2500hd

Nice swap. The nv4500 will bolt up to the 6.0. Where can I find one without having a core. I found some places online that sell them but you need a core. Any suggestions

If you are still looking let me know and i can look up the place i used. i didn't have core and they shipped my tranny in days. 4wd nv4500